Use floating labels for preference forms

chrome/android/java/res/layout/preference_float_label_layout.xml

Index: chrome/android/java/res/layout/preference_float_label_layout.xml
diff --git a/chrome/android/java/res/layout/preference_float_label_layout.xml b/chrome/android/java/res/layout/preference_float_label_layout.xml
new file mode 100644
index 0000000000000000000000000000000000000000..1d15b88c05027a425cbb69ca95bb753b80eb8c79
--- /dev/null
+++ b/chrome/android/java/res/layout/preference_float_label_layout.xml
@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2014 The Chromium Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style license that can be
+     found in the LICENSE file. -->
+
+<org.chromium.chrome.browser.widget.FloatLabelLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:id="@+id/float_label_layout" >
+    <EditText
+        android:id="@+id/address_edit_text"

[Evan Stade, 2015/01/28 03:07:47]

this file seems generic but this id is "address_edit_text"?

[Theresa, 2015/01/28 03:33:47]

The file name is poor, sorry. I'll change it.  This layout is only intended to
be used specifically for address fields since the inputType for the EditText is
set to textPostalAddress|textCapWords.

+        android:singleLine="true"

[Evan Stade, 2015/01/28 03:07:47]

street address must be multiline

[Theresa, 2015/01/28 03:33:47]

The mocks call for a single street address line, and multiline street addresses
are deprecated. They're marked as such in the libaddressinput's
AddressField.java and the AddressField enum on the C++ side doesn't even include
a placeholder for the deprecated address_line_1 and address_line_2 fields. I
tested with multiline street addresses, and if there's a line break in the
street_address, it's displayed as a space in the single line EditText box.

[Evan Stade, 2015/01/29 01:07:22]

This is incorrect. Multiline street addresses are not deprecated. address_line_1
and address_line_2 are old, single-line inputs, and are deprecated because they
should be replaced by a single, multiline street address of arbitrarily many
lines.

They don't appear in the mocks because
1) street addresses with just one line should look like one line and expand as
necessary, and/or
2) the designer didn't consider the multiline case.

[Theresa, 2015/01/29 05:22:13]

Done.

+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content"
+        android:inputType = "textPostalAddress|textCapWords" />
+</org.chromium.chrome.browser.widget.FloatLabelLayout>